21033200000 has 96 divisors (see below), whose sum is σ = 52375241520. Its totient is φ = 8413120000.

The previous prime is 21033199997. The next prime is 21033200009. The reversal of 21033200000 is 233012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033200009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 373709 + ... + 426291.

Almost surely, 2^21033200000 is an apocalyptic number.

21033200000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21033200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26187620760).

21033200000 is an abundant number, since it is smaller than the sum of its proper divisors (31342041520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21033200000 is an frugal number, since it uses more digits than its factorization.

21033200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52622 (or 52590 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

Adding to 21033200000 its reverse (233012), we get a palindrome (21033433012).

The spelling of 21033200000 in words is "twenty-one billion, thirty-three million, two hundred thousand".